M3.0 earthquake 6 km NW of Challis, Idaho
A magnitude 3.0 earthquake struck 6 km NW of Challis, Idaho on Sat, Oct 19, 1985, 9:15 PM MDT (03:15 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M4.1 17 km SE of Challis, Idaho. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.0 (ml), minor
- Local time
- UTC
- 1985-10-20 03:15:56 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 44.548° N, 114.283° W
- Region
- Idaho
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.117 km SE of Challis, Idaho · 14938 days ago · 5 km deep · 24 km away
- 3.215 km SSE of Challis, Idaho · 14937 days ago · 5 km deep · 21 km away
- 3.434 km SE of Clayton, Idaho · 14905 days ago · 5 km deep · 56 km away
- 3.028 km ESE of Leadore, Idaho · 14894 days ago · 5 km deep · 97 km away
- 2.717 km ENE of Clayton, Idaho · 14892 days ago · 5 km deep · 25 km away
Before
- 3.18 km SE of Challis, Idaho · 14958 days ago · 5 km deep · 15 km away
- 3.37 km SE of Challis, Idaho · 14958 days ago · 5 km deep · 14 km away
- 2.415 km S of Challis, Idaho · 14961 days ago · 5 km deep · 21 km away
- 2.414 km NE of Clayton, Idaho · 14961 days ago · 5 km deep · 23 km away
- 2.88 km SSW of Challis, Idaho · 14973 days ago · 5 km deep · 13 km away
- 2.819 km E of Clayton, Idaho · 14974 days ago · 5 km deep · 33 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002kyu. Read Tue, Sep 22, 2026, 10:46 AM UTC.